練習題庫/huikao・難度 5若 0.3x−0.20.4−0.2x−0.10.30.5=0.6\dfrac{\dfrac{0.3x-0.2}{0.4}-\dfrac{0.2x-0.1}{0.3}}{0.5}=0.60.50.40.3x−0.2−0.30.2x−0.1=0.6，則 xxx 的值為何？(A)685\dfrac{68}{5}568(B)285\dfrac{28}{5}528(C)465\dfrac{46}{5}546登入後即可作答並查看完整詳解（每日免費 5 題）。